Start booting instances at vexxhost-sjc1
Start booting instances at vexxhost-sjc1

This starts by booting only 10 instances to start with a small
sanity check to make sure everything is working well.  The
number will be bumped up once things are running well.

Change-Id: I196c1a5a53f314632644f31b54debbc016ab8b5e

openstack-infra/project-config,openstack-infra/project-config